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Online Appendix: Spatial Diffusion of Economic Shocks in Networks Online Appendix: Spatial Diffusion of Economic Shocks in Networks Ashani Amarasinghe∗ Roland Hodlery Paul A. Raschkyz Yves Zenoux September 2018 Not for Publication ∗Department of Economics, Monash University; email: [email protected]. yDepartment of Economics, University of St.Gallen; CEPR, CESifo, and OxCarre; email: [email protected]. zDepartment of Economics, Monash University; email: [email protected]. xDepartment of Economics, Monash University; CEPR and IZA; email: [email protected]. A.1 Contents A Additional Data Description B Correlation between Subnational GDP and Subnational Nighttime Lights in Africa C Main Result (complete table) D Robustness: Province-Year Fixed Effects E Robustness: Temporal and Spatial Lags F Robustness: Spatial Clustering of Standard Error G Robustness: Grid Cells as Unit of Observation H Robustness: Excluding Top Mineral Producers I Robustness: Fiscal Channel J Robustness: Contiguity Network K Robustness: Geodesic Network without Adjustment for Variability in Altitude L Robustness: Alternative Ethnicity Network M Robustness: Networks within and across Countries N Top-Ten Key Player Rankings for Populous Countries O Top-Ten Rankings from Policy Experiments for Kenya and Nigeria P Top-Ten Rankings from Policy Experiments for Other Populous Countries A.2 A Additional Data Description A.1 Subnational Districts and Countries Our analysis focuses on 5944 subnational districts, i.e., ADM2 regions, in 53 countries across the African continent. The list of countries and the number of subnational regions belonging to each country appear in Table A1. The geographic dispersion of subnational regions is graphically represented in Figure A1. Figure A1: Districts in Africa A.3 Table A1: List of Countries Country No. of districts 1 Algeria 1,504 2 Angola 163 3 Benin 76 4 Botswana 25 5 Burkina Faso 301 6 Burundi 133 7 Cameroon 58 8 Cape Verde 16 9 Central African Republic 51 10 Chad 53 11 Comoros 3 12 Ivory Coast 50 13 Democratic Republic of the Congo 38 14 Djibouti 11 15 Egypt 26 16 Equatorial Guinea 6 17 Eritrea 50 18 Ethiopia 72 19 Gabon 37 20 Gambia 13 21 Ghana 137 22 Guinea 34 23 Guinea-Bissau 37 24 Kenya 48 25 Lesotho 10 26 Liberia 66 27 Libya 32 28 Madagascar 22 29 Malawi 253 30 Mali 51 31 Mauritania 44 32 Mauritius 10 33 Morocco 54 34 Mozambique 128 35 Namibia 107 36 Niger 36 37 Nigeria 775 38 Republic of Congo 46 39 Rwanda 142 40 Sao Tome and Principe 2 41 Senegal 30 42 Sierra Leone 14 43 Somalia 74 44 South Africa 354 45 Sudan 26 46 Swaziland 4 47 Tanzania 136 48 Togo 21 49 Tunisia 267 50 Uganda 162 51 Western Sahara 4 52 Zambia 72 53 Zimbabwe 60 A.4 A.2 Ethnic Homelands The ethnic connectivity matrix is based on the digitized map version of the Murdock (1958) map of the boundaries of ethnic homelands in Africa shown in Figure A2. Using the spatial overlay tool in ArcMap 10.2, we combined the ADM2 polylines from Figure A1 with the ethnic homeland polylines from Figure A2 to assign each district the ethnicity of the ethnic homeland that covers the largest area of this district. Figure A2: Ethnic Homelands in Africa A.5 A.3 Road Network Figure A3 shows the network of primary and secondary roads (in purple) from the Open- StreetMap data, with the district boundaries in the background (in light-gray). Figure A3: Primary and Secondary Roads in Africa A.6 A.4 Mines & Minerals Figure A4 shows the location of mines from the SNL Minings & Metals database, with the district boundaries in the background. Table A2 lists the different types of minerals covered in this database as well as the source for the information on the world market price of these minerals. Figure A4: Distribution of Mines in Africa A.7 Table A2: List of Minerals Name Measure Source 1 Antimony Tonnes USGS Commodity Prices 2 Bauxite Tonnes USGS Commodity Prices 3 Chromite Tonnes USGS Commodity Prices 4 Coal Tonnes World Bank 5 Cobalt Tonnes USGS Commodity Prices 6 Copper Tonnes SNL-Thomas Reuters 7 Diamond Carats USGS Commodity Prices 8 Gold Ounces SNL-Thomas Reuters 9 Graphite Tonnes USGS Commodity Prices 10 Ilmenite Tonnes USGS Commodity Prices 11 Iron Tonnes World Bank 12 Lanthanide Tonnes USGS Commodity Prices 13 Lead Tonnes World Bank 14 Lithium Tonnes USGS Commodity Prices 15 Managanese Tonnes USGS Commodity Prices 16 Nickel Tonnes World Bank 17 Niobium Tonnes USGS Commodity Prices 18 Palladium Ounces SNL-Thomas Reuters 19 Phosphate Tonnes World Bank 20 Platinum Ounces SNL-Thomas Reuters 21 Potash Tonnes World Bank 22 Rutile Tonnes USGS Commodity Prices 23 Silver Ounces World Bank 24 Tin Tonnes SNL-Thomas Reuters 25 Tantalum Tonnes USGS Commodity Prices 26 Tungsten Tonnes USGS Commodity Prices 27 Uranium Oxide Pounds International Monetary Fund 28 Vanadium Tonnes USGS Commodity Prices 29 Yttrium Tonnes SNL-Thomas Reuters 30 Zinc Tonnes SNL-Thomas Reuters 31 Zircon Tonnes USGS Commodity Prices A.8 B Correlation between Subnational GDP and Sub- national Nighttime Lights in Africa Hodler and Raschky (2014, Appendix B) document a strong correlation between GDP per capita and nighttime lights in subnational administrative regions using the subnational GDP data by Gennaioli et al. (2014). In Table B1, we replicate their analysis using their data, but restricting the sample to the 82 subnational regions from the nine African countries for which Gennaioli et al. (2014) provide subnational GDP data. These countries are: Benin, Egypt, Kenya, Lesotho, Morocco, Mozambique, Nigeria, South Africa, and Tanzania. Comparing the results reported in Table B1 with those in Hodler and Raschky (2014) suggests that the relation between subnational GDP per capita and subnational nighttime lights is very similar in Africa as elsewhere. Table B1: Subnational GDP and Nighttime Lights in Africa (1) (2) Lightict 0.291*** 0.354*** (0.005) (0.047) R-squared 0.688 0.688 Observations 1,200 1,200 Region FE NO YES Notes: Dependent variable is the logarithm of regional GDP per capita. OLS regressions. Lightict is the logarithm of average nighttime lights. Robust standard errors in parentheses. ***, **, * indicate sig- nificance at the 1, 5 and 10%-level, respectively. A.9 C Main Result (complete table) Table C1: Connectivity based on ethnicity, geography and roads (1) (2) (3) (4) (5) (6) (7) (8) OLS IV OLS IV OLS IV OLS IV Dependent variable: Lightict Ethnicity W Lightjct 0.552*** 0.271 0.160*** 0.342*** (0.015) (0.176) (0.013) (0.122) Inv Dist W Lightjct 0.550*** 0.639*** 0.246*** 0.305** (0.012) (0.131) (0.011) (0.124) Inv Road W Lightjct 0.556*** 0.280** 0.393*** 0.361*** (0.010) (0.113) (0.015) (0.116) P opulationict 0.243*** 0.179*** 0.178*** -0.023 0.162*** -0.098*** 0.095*** -0.220*** (0.033) (0.035) (0.027) (0.031) (0.026) (0.033) (0.026) (0.036) Conflictict -0.011* -0.012** -0.011* -0.011* -0.010** -0.013** -0.008 -0.006 (0.006) (0.006) (0.006) (0.006) (0.005) (0.006) (0.005) (0.006) Ethnicity W P opulationjct -0.377*** 0.096 -0.171*** -0.256*** (0.041) (0.060) (0.035) (0.057) Ethnicity W Conflictjct -0.031*** -0.043** -0.019* -0.020 (0.011) (0.018) (0.011) (0.017) Inv Dist W P opulationjct -0.247*** 0.363*** -0.021 0.240*** (0.039) (0.042) (0.036) (0.046) Inv Dist W Conflictjct -0.018* -0.018 -0.009 -0.012 (0.011) (0.015) (0.011) (0.015) Inv Road W P opulationjct -0.128*** 0.582*** 0.048 0.475*** (0.035) (0.043) (0.041) (0.050) Inv Road W Conflictjct -0.004 -0.018 0.004 0.001 (0.009) (0.012) (0.010) (0.013) MPict 0.125*** 0.118*** 0.120*** 0.116*** 0.111*** 0.112*** 0.115*** 0.107*** (0.014) (0.015) (0.013) (0.014) (0.013) (0.014) (0.014) (0.016) First stage: Dependent variable: Lightjct MPjct 0.121*** 0.124*** 0.119*** 0.123*** (0.015) (0.014) (0.014) (0.015) First-stage F-stat 63.83 85.00 71.90 63.64 Observations 101,048 101,048 101,048 101,048 101,048 101,048 101,048 101,048 District FE YES YES YES YES YES YES YES YES Country-year FE YES YES YES YES YES YES YES YES Additional controls YES YES YES YES YES YES YES YES Notes: This table corresponds to Table 2 in Section 6, but reports the coefficient estimates on all (second-stage) control variables. Even columns report standard fixed effects regressions with district and country-year fixed effects, and odd columns IV estimates. See Section 4 for the definitions of all variables. The first stage further includes the control variables indicated in Section 5. Standard errors, clustered at the network level, are in parentheses. ***, **, * indicate significance at the 1, 5 and 10% level, respectively. A.10 D Robustness: Province-Year Fixed Effects Table D1: Province-Year Fixed Effects (1) (2) (3) (4) (5) (6) (7) (8) OLS IV OLS IV OLS IV OLS IV Dependent variable: Lightict Ethnicity W Lightjct 0.044** 0.301 -0.029 0.469*** (0.019) (0.187) (0.019) (0.151) Inv Dist W Lightjct 0.118*** 0.748*** 0.037** 0.473*** (0.015) (0.119) (0.014) (0.101) Inv Road W Lightjct 0.220*** 0.779*** 0.214*** 0.484*** (0.013) (0.108) (0.017) (0.119) First stage: Dependent variable: Lightjct MPjct 0.132*** 0.131*** 0.133*** 0.136*** (0.015) (0.014) (0.015) (0.016) First-stage F-stat 74.15 89.56 84.44 69.15 Observations 101,048 101,048 101,048 101,048 101,048 101,048 101,048 101,048 District FE YES YES YES YES YES YES YES YES Province-year FE YES YES YES YES YES YES YES YES Additional controls YES YES YES YES YES YES YES YES Notes: Even columns report standard fixed effects regressions with district and province(ADM1)-year fixed effects, and odd columns IV estimates.
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